Re: Understanding a split-mode power supply.

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#1621

From: Sylvia Else
Date: Tue, 06 Jan 2009 03:19

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Phil Allison wrote:
> "Sylvia Else"
>> Phil Allison wrote:
>>> "Sylvia Else"
>>>
>>>
>>>> As for whether I could substitute a 6.8, maybe I could, though I'd have 
>>>> trouble getting one that has a 350 volt rating.
>>>
>>>  **   Huh   ??????????
>>>
>>> No need for that whatsoever.
>>>
>>> In operation, the resistor is not subjected to more than a few volts.
>> As I commented earlier, if the switching transistor fails by shorting out, 
>> then the resistor will blow. After it's blown it'll have 340V across it.
> 
> ** Irrelevant.
> 
> Once it has fused, the resistor  will be OPEN circuit.

Which just means it won't conduct unless the voltage across it exceeds 
its insulating properties.

> 
> The voltage across the break can be thousands of volts.

So you say, but where's the evidence?

Sylvia.

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Date: Tue, 06 Jan 2009 14:19:07 +1100
From: Sylvia Else <sylvia@not.at.this.address>
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Subject: Re: Understanding a split-mode power supply.
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